H. Surdi, A. Singh, S. S. Prabhu 
Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai,India
Since the advent of Terhertz(THz) technology, improving the THz emission power has been one of the major research goal. One of the methods to increase the THz emission power is to increase the coupling of excitation laser light to the dielectric substrate.The field of nano-plasmonics exploits light-matter interactions at nanometer scale. With the help of metallic nano-structure at metal ...
M. Herlitschke, M. Blasl, and F. Costache
Fraunhofer Institute for Photonic Microsystems
3D FEM simulation of millimeter-scale, complex electro-optically induced waveguide based devices demands the use of grids with more than several million nodes. Hence the simulation could take substantial time and require large amounts of available memory. This paper presents a computation algorithm based on the conversion of an initial 3D waveguide structure into an analogous 2D structure, ...
Christ University, Bengaluru, Karnataka, India
Fluorescence Diffuse Optical Tomography (FDOT) uses Near Infra-Red (NIR) light to monitor physiological changes in internal organs. NIR light being less energetic in nature can be used for continuous monitoring of tumor infected biological tissue, neonatal brain and many such applications where high energy radiation can cause severe damage. In this paper, a comparative study on the 3D modeling ...
S. Kaim, B. Anderson, G. Venus, J. Lumeau, V. Smirnov, B. Zeldovich, L. Glebov
CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA
OptiGrate Corp, Oviedo, FL, USA
Forced airflow cooling of a Volume Bragg Grating heated by a laser beam was investigated by means of simulation with COMSOL Multiphysics®. In addition to air cooling of unrestricted airflow, a case of airflow directed by limiting glass plates was investigated. A number of temperature distributions and thermal deformations were obtained in simulations for different rates of airflows. Simulations ...
J. T. Andrews, R. Choubey, O P Choudhary, N. Malviya, A. Patel, M. Kumar, S. Chouksey, J. Solanki
National MEMS Design Center, Department of Applied Physics, Shri G S Institute of Technology & Science, Indore 452003 MP, India
A logic gate performs a certain Boolean logic operation on one or more logical inputs and produces a single logical output. The logic values are either “true” or “false.” Logic gates are bistable devices, that is, they may yield one of these two possible stable outputs. The NAND logic is a universal gate; any logic operation can be performed with various combinations of NAND logics. Many ...
J. J. Mahakud, D. Sengupta
Institute of Technical Education & Research, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha, India
Solar energy is the cleanest form of renewable energy. The most popular form of utilization of solar energy is through the use of photovoltaic cells. Currently the efficiency of available solar cells lies below 20%. To increase the efficiency, multi-junction can be used in solar cells. While developing such devices we need platform to study various characteristics and parameters to optimize ...
COMSOL Multiphysics® Investigation of Radiative and Nonradiative Channels of Quantum Emitter Fluorescence near Hyperbolic Metamaterial
A. Pavlov, V. Klimov, I. Zabkov, D. Guzatov
Lebedev Physical Institute, Moscow, Russia
Moscow Institute of Physics and Technology, Dolgoprudnj, Russia
State University of Grodno, Grodno, Belarus
Effective control over single atom emission might lead to major breakthrough in the field of nanotechnology. It is believed that use of hyperbolic metamaterials (HMM) can be helpful. COMSOL Multiphysics® was used to model interaction of electric dipole with effective HMM and calculate emission rate of dipole in comparison to that value in the absence of metamaterial. Dielectric nanoantennas of ...
J. Toney, J. Retz, V. Stenger, A. Pollick, P. Pontius, S. Sriram
SRICO, Inc., Columbus, OH, USA
This paper presents techniques for modeling annealed proton exchange (APE) and reverse proton exchange (RPE) waveguides in periodically poled lithium niobate for application to optical frequency conversion. A combination of time-dependent diffusion modeling and electromagnetic mode analysis using the RF module are used to predict the relationship between the poling period and the second harmonic ...
H. Kwon, R. Huancaya
Andrews University, Berrien Springs, MI, USA
Vein visualization systems such as the VeinViewer are vein-contrast enhancement devices that use an infrared camera to highlight blood or the underlying vasculature and project the image in real time onto the skin. Understanding the light propagation in a realistic skin model is critical, but only a few computational models have been developed to account for this particular system. We have ...
G. Grasso, V. M. N. Passaro, F. De Leonardis
Photonics Research Group, Politechnic Institute of Bari, Bari, Italy
In this paper a multiphysics approach to study the optical properties of integrated waveguides influenced by thermal and mechanical stress is presented. The heating and pressure effects are evaluated by means the Heat Transfer and Structural Mechanics modules respectively. Finally, the electromagnetics capabilities of the AC/DC Module are used in order to evaluate the optical eigenfunctions and ...